Exploring Antenna Innovation with Keysight at EuCAP 2025
Have you ever wondered how your smartphone, Wi-Fi, or even your car's GPS works so seamlessly? The secret lies in the incredible world of antennas. These unsung heroes of wireless communication are everywhere, making our lives easier and more connected.
A few weeks ago, the 2025 edition of EuCAP (European Conference on Antennas and Propagation) was held in the vibrant city of Stockholm, Sweden. If you’re not familiar with this conference, let me fill you in. EuCAP is the largest antennas and propagation conference in Europe, attracting over 1700 participants from academia and industry. This year's conference showcased the latest technological and scientific discoveries in antennas and propagation, focusing strongly on 5G / 6G, radar, and non-terrestrial network (NTN) technologies. And guess what? The team and I were right there amid it all, soaking up the knowledge and connecting with fellow enthusiasts.
Inspired by the amazing insights from EuCAP, I decided to write about antennas today. Let’s explore how they work, why they are important, how to measure them, and the latest developments in this field. Ready? Let's go!
The Heartbeat of Wireless Communication
Alright, let's get to the heart of the matter: antennas! These nifty devices are like the heartbeat of wireless communication, converting electrical signals into electromagnetic waves and vice versa. It's a bridge between the electrical world (like your phone or radio) and the radio wave world (like signals flying through the air).
They come in all shapes and sizes, each designed for specific tasks. Imagine them as the magic wands that make your devices communicate with each other.
Let’s break down a few types of antennas you’re likely to encounter:
- Dipole antennas: These are the classics. Simple, effective, and often used in radios. They're like the reliable old friend you can always count on.
- Patch antennas: Sleek, compact, efficient, and perfect for high-frequency applications. These are the ones quietly working inside your smartphone.
- Yagi-Uda antennas: Known for their high gain and directivity, these antennas are like the precision tools used for TV reception. Imagine them as the snipers of the antenna world, hitting the target every time.
But designing a great antenna is just part of the story. To make sure they perform at their best, we need to measure them precisely. Understanding an antenna’s characteristics is key to building strong, efficient communication systems. Here’s a quick tour through some of the important performance metrics:
- Antenna gain: It measures how effectively an antenna directs radio frequency energy in a particular direction compared to an isotropic radiator. Higher gain indicates a more focused energy beam, which is beneficial for long-distance communication. Tools like network analyzers help us to measure antenna gain accurately.
- Inverse-square law: This fundamental principle states that the power density of an electromagnetic wave decreases proportionally to the square of the distance from the source. In antenna theory, this means that doubling the distance from the antenna results in a quarter of the power density, impacting signal strength and coverage area.
- Directivity: It refers to an antenna's ability to focus energy in a specific direction. High-directivity antennas concentrate energy into narrow beams, enhancing signal strength in desired directions and reducing interference from others.
- Return loss and Voltage Standing Wave Ratio (VSWR): Return loss quantifies how much power is reflected back to the source due to impedance mismatches, with higher values indicating better matching and less reflection. VSWR is another metric for assessing impedance matching, where a value close to 1:1 signifies optimal matching. Spectrum analyzers can be employed to measure these parameters, ensuring efficient power transfer and minimal signal loss.
So the next time you stream a video, send a message, or scroll through social media, just remember, there’s an entire world of clever antenna engineering making it all possible, one signal at a time. And that world involves some cool testing techniques:
- Vector Network Analyzers (VNAs): VNAs measure the S-parameters of antennas, providing insights into their performance across different frequencies.
Figure 1. The Keysight PNA-X Pro VNA in action
- Anechoic chambers: These environments eliminate external interference, allowing precise measurement of radiation patterns and gain. It's like giving antennas a quiet space to show their true potential.
- Field measurements: Sometimes, you have to take the lab into the real world. Tools like Keysight's FieldFox portable analyzers are perfect for on-site testing and troubleshooting. Think of them as mobile science labs in a backpack: versatile, rugged, and ready to go wherever the signal leads.
Innovations in Antenna Technology
The world of antennas is moving fast, and it's not just about better bars on your phone anymore. With the rapid evolution of wireless tech, antennas are becoming smarter, more precise, and more powerful than ever before.
Here are just a few of the exciting breakthroughs shaping the future:
Beamforming: Techniques that direct signals towards specific users, improving efficiency and reducing interference. Essential for 5G, Wi-Fi 6/7, and radar systems.
Multiple Input Multiple Output (MIMO): Systems that use multiple antennas to enhance data throughput and reliability. It's at the heart of everything from smartphones and routers to satellite communication systems.
5G Antennas: Designed specifically for ultra-fast, low-latency connections, these antennas are paving the way for real-time experiences like remote surgery, self-driving cars, and immersive augmented reality (AR) / virtual reality (VR).
Evolving Use Cases
The innovation doesn’t stop there. Antennas are also expanding into non-terrestrial and next-gen communication systems:
- Antennas in NTN: Non-terrestrial networks are revolutionizing connectivity by integrating satellite and high-altitude platforms with traditional terrestrial networks. This hybrid approach ensures seamless communication even in remote areas. Antennas for NTN must be highly adaptable and capable of maintaining reliable connections across vast distances.
- 6G antennas: as we look towards the future, 6G technology promises to transform wireless communication with unprecedented speed and reliability. 6G antennas will operate at higher frequencies, including terahertz (THz) bands, enabling ultra-fast data transfers and supporting advanced applications like holographic communication and real-time sensing.
- 6G antennas will be the backbone of smart city initiatives, powering systems that manage traffic, monitor air quality, and optimize energy use. These antennas will ensure that data flows quickly and efficiently, making cities more responsive and intelligent.
- The Internet of Things (IoT) will reach new heights with 6G technology. 6G antennas will connect billions of devices, ensuring seamless communication for applications like autonomous vehicles, industrial automation, and healthcare. Imagine a world where your fridge talks to your grocery store—no more running out of milk!
Keysight at EuCAP 2025
Figure 2. Keysight experts engaging with attendees at EuCAP 2025
Now, let’s zoom in on EuCAP 2025, where the antenna world came together — and where Keysight was front and center. EuCAP 2025 introduced exciting new themes, including:
- Wi-Fi 8 and Advanced Antenna Architectures: Topics included loop antennas for Wi-Fi 6/6E, metasurface-based surface wave communications, and smart electromagnetic skin synthesis for enhanced indoor mm-wave coverage.
- Integration of Machine Learning in Electromagnetics: AI isn’t just for chatbots anymore. The conference emphasized the growing role of machine learning in electromagnetic applications. Sessions under this theme explored optimization methods and the application of AI techniques to improve antenna performance and design processes.
- Focus on NTN and 6G Technologies: EuCAP 2025 addressed the challenges and innovations related to NTN and the upcoming 6G technologies. Discussions included advancements in satellite communications and the integration of NTN in global connectivity solutions. Keysight covered two workshops covering NTN and 6G challenges and key solutions to address them.
- Emphasis on Metamaterials and Metasurfaces: There was a significant focus on the development and application of metamaterials and metasurfaces in antenna design, delving into how these materials can be engineered to achieve desired electromagnetic properties, leading to more efficient and compact antenna systems.
We’ve Got You Covered: Keysight’s Antenna Testing Solutions
When it comes to pushing antenna tech forward, it’s not just about theory, it’s about precision measurement. That’s where Keysight shines. Here are some of the top tools engineers are using / can use to turn ideas into real-world performance:
S7601A Antenna Measurement Toolset: Designed to test and verify different types of antennas for cellular, automotive, and satellite communication. Key features include spherical antenna pattern measurements, phased array control and calibration, and a GUI for manipulating patterns in 2D, 3D, and tabular formats.
Figure 3. The Keysight Antenna Measurement Toolset
F9650A Compact Antenna Test Range (CATR): Offers quiet zone diameters of 30 and 40 cm, operating from 6-110 GHz. This modular format is ideal for precise antenna testing in a controlled environment.
FieldFox Handheld Analyzers: Perfect for field measurements, these portable devices offer features like CalReady and QuickCal for easy calibration, making them ideal for on-site testing and troubleshooting.
Figure 4. The Keysight 85574A Handheld Direction Finding Antenna with the Keysight FieldFox
Vector Network Analyzers (VNAs): Measure how antennas behave across different frequencies, providing insights into S-parameters, gain, efficiency, and more to ensure optimal antenna performance.
Anechoic Chambers: For precise measurement of radiation patterns and gain, Keysight offers full-sized anechoic chambers. These chambers eliminate external noise, allowing for accurate and reliable antenna measurements.
The Bottom Line
Antennas are the backbone of our connected world. Understanding their principles, measurement techniques, and innovations is key to optimizing performance and ensuring seamless connectivity. As technology continues to advance, antennas will play an even more critical role, paving the way for a future where everything is connected. So next time you use your smartphone or Wi-Fi, take a moment to appreciate the magic of antennas working behind the scenes.
Keysight provides a range of top-notch solutions for antenna testing, ensuring your antennas perform at their best. Whether you're testing in the field or measuring with VNAs, Keysight has you covered. So next time you're working on antenna testing, remember the reliable solutions from Keysight.
Want to meet us? Check out the list of our upcoming events and join us for more insightful sessions and demos!
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